Apparatus for concentrating sulfuric acid.



No. 859,757 PATENTBD JULY 9, 19o?.

A.'GAII.LAR1J. l APPARATUS Fon 'UONQENTR'ATING sULPURIo ACID.

APPLIOATIONYFILBD. ILIAS. 1907.

J0 n. 1w .d

IIIV 5/ APATENT OFFIOF- ANTONIO GAILLARD, OF BARCELONA, SPAIN.l

.APPARATUS FOR CONENTRATING `SULIFURIC ACID.

Specicationofietters Patent.

Patented July 9, 1907.

Application filed March 25,1907. Serial No. 364,532.

Toall whom il. may concern: v

Be it known that I, ANTONIO GAILLARD, manufacturer, a citizen of the French Republic, residing at Barcelona, Spain, Plaza de Palacio, No. 6, have invented certain new and usefulrlmprovements in Apparatus for the Concentration of Sulfuric Acid; and I do hereby declare the following to be a full, clear, and exact description ot' the invention, such as will enable others skilled in the art to which it appertains to'rnake and use the same.

My invention relates to apparatus for the concentration of sulfuric acid, the present invention being an improvement upon my former application, Serial No. 297,695, filed January 24, 1906.

The apparatus in general is composed of a vertical tower which stands inside of a receptacle or tank in which the concentrated acid accumulates. Near the bottom of this tower is located a perforated plate of refractory material which separates the concentrated acid from the hot gases inside the tower.

The invention comprises an inner coating or wall of refractory stone for the lower part oi the tower, which may be changed without disturbing the tower, and which is interlocked at -the top with the outer coating or wall; a perforated refractory plate above the bottom of the tank in which the concentrated acid accumulates in order ,to protect this tank from the action of the hot acid; an oliter receptacle surrounding said tank and in which said tank rests, said receptacle being provid ed with cooling means; and at the upper part of the tower a movable coder closed by a hydraulic seal through which enters the pipe through which the acid to be concentrated is sprayed, and through which cover The lower internal part of ith'e tower is provided with a coating of refractory/brooks or stones b1, which are interlocked together'and the upper one of which interlocks -with the projecting central stone of block be. This lower coating or layer may be changed or removed when worn. The vreason for using this extra layer is that itis well known that sulfuric acidwhen hot and highly concentrated (96.99 per cent of H2SO4) attacks the material of whichlthe tower is composed. 1n my pparatus, the stones or blocksin the lower part of the /tower are well protected to ,a certain height from the action of the heat, and/from the 4contact with the concentratc'd acid in itscironger form by means of the inh-rnol coating b. Only this inner coating bl is directlyin contact with the 110i; m, m1422015, tmlwithll acid concentrated more than to contain 78.8 per cent of pure sulfuric acid.- In other words, the upper portion of the tower is not attacked in anyserious degree in the concentration process. This coating b may be changed very quickly, and'at a very low cost, and after it has been changed, the whole chamber `becomes almost as good as new Without having to pull down the tower and,A build it -up again.

The tower rests upon a plate 'r ofvrefr'actory material, which plate rests upon the bottom of a receptacle d adapted to receive the concentrated sulfuric acid, and which receptacle is provided with` any outer casing n,

the wholedoeing made in'one piece and adapted to contain waterlor other cooling material.

'i represents thel inletor the hot gases, and g represents a discharge pipe therefor.

The top o the tower is provided with an annular rewhich is forced in at the top of the tower may be finely sprayed. l

Underneath the pipe i', the bottom of the tower is closed by a plate c of refractory material, having aperforation therein or delivering the concentrated acid into the receptacle d. The central part of this plate rests upon a series of blocks s, which in tum res't upon the plate r. e represents a pipe which is coiled around, through and among the blocks s for the purpose of supplying'water to cool the hot acid as it drips down through the plate c. outer receptacle n, and is provided with an overflow `pipe e. Suitable means, not shown, are, of course,

provided for drawing the concentrated receptacle d. v

Having thus described my invention, I claim:-

1. An apparatus for' the concentration of sulfuric acid,

acid out of the The end of this pipe delivers into the including a tower having an unobstructed interior built up of blocks of acid resisting material, a loaden casing ncloslng said blocks, said blocks being lnterlockedtogether, and an inner coating or wall of blocks of refrac-4 tory material in the lower part of the tower, -suld inner wall being composed of blocks interlocking with each other and with the outer wall, substantially as described.

2. In an apparatus for the concentration of sulfuric acld, the combination of a tower having an unobstructed interior, said tower being composed of lnterlocked' blocks ,of refractory material and a lend casing therefor,l and be lng provided lln its lower portion with an Inner coating or wall of refractory material composed ot blocks lnterlocked together and inter-locked with 4the outer coating, a receptacle for the reception ot the concentrated acldl, and a refractory plate In said receptacle upon which laid tower Irests, substantially as described.

- '3. In an apparatus for the concentration ot 'sulfuric acid,the combination 4o! n vor'tlcal tower' composed o t blocks of refractory material interlocked together and surrounded by a lead casing and having at its lower part an v 4inner coating or wall made of blocks o t refractory material 'interlocked together and with the outer coating, a receptacle in which the concentrated acid is received, a plate in said receptacle on which said tower rests, a receptacle -surrounding the acid receptacle, and means for circulattacie in which the concentrated acid accumuias, a refractory plate in said receptacle on which said tower rests,

an exterior receptacle surrounding the acid receptacle, means for causing a current of water to circulate through said receptacles, a cover for the upper part of said tower, and a hydraulic seal for said cover, substantially as de surrounding the same, an inner coating or wail of refruc- 'tory material for the lower part of the tower composed'of blocks interlocking with each other and' with the outer coating, :1 perforated plate closing the lower part of said tower, a receptacle for tiles/concentrated acid, :i refractoryplate in said receptacle upon which suid tower rests.. a second receptacle surrounding,r saidrrstmamed:receptacie, means for causing water to circulate through both of said'receptacles, a cover yfor the top of said tower, a liquid seal therefor, un inlet pipe provided with n nozzle for delivering the weak sulfuric acid luto said tower, aud gas inlet and outlet pipes, substzlntiully'as described.

In testimony whereof, I 'nix my signature, iu presence of two witnesses. 1

^ ANTONIO GAILLARD. 1 Witnesses f f S'IAumas;Y C. HARRIS, L CoNsrXN'ixu Lornz Crono. @7.1 

